Difference in height associated with a translation start site polymorphism in the vitamin D receptor gene

被引:41
作者
Minamitani, K [1 ]
Takahashi, Y [1 ]
Minagawa, M [1 ]
Yasuda, T [1 ]
Niimi, H [1 ]
机构
[1] Chiba Univ, Dept Pediat, Sch Med, Chuo Ku, Chiba 2608670, Japan
关键词
D O I
10.1203/00006450-199811000-00002
中图分类号
R72 [儿科学];
学科分类号
100202 ;
摘要
The function of 1,25-dihydroxyvitamin D-3 in bone development is to regulate the differentiation or proliferation of osteoblastic, osteoclastic, and chondrocytic lineage, affecting bone mineralization and linear bone growth. An A(T/C)G substitution exists in the first of the two putative translation initiation sites in exon 2 of the vitamin D receptor (VDR) gene. We studied the relationship between exon 2 polymorphism and height in 90 healthy Japanese female subjects aged 18-20 y, who had attained final height, in 159 healthy Japanese aged 13 y, and 24 children with constitutional short stature aged 6-10 y less than -1.5 SD in height, mostly with parents of normal height. Exon 2 polymorphism was analyzed by PCR-single strand conformation polymorphism, PCR-direct sequencing, and PCR-restriction fragment length polymorphism. The frequency of the exon 2 polymorphism was genotype CC (ACG/ACG), 0.37; genotype CT (ACG/ATG), 0.51; and genotype TT (ATG/ATG), 0.12 in 249 normal subjects. The mean height of female subjects aged 18-20 y with the genotype CT was 160.3 +/- 4.3 cm (mean +/- SD), whereas that with CC was 4.4 cm lower (p < 0.0001), and that with TT was 2.7 cm lower (p = 0.0302). At age 13 y, this trend was observed, and the mean height SD score of subjects with the genotype CT was taller than homozygotes (CC/CT; p = 0.0363 aad CT/TT; p = 0.0208) in 159 subjects. Genotype CT in 24 children with constitutional short stature was less frequent than other genotypes (CC, 0.62; CT, 0.21; TT. 0.17) (chi(2) p value, 0.0171). In conclusion, the exon 2 polymorphism affecting the VDR mRNA and protein is one of the major determinants of adult height at least in female Japanese, which was noted at the age of 13 y examined in both sexes.
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页码:628 / 632
页数:5
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